331402344 has 128 divisors (see below), whose sum is σ = 1044852480. Its totient is φ = 85248000.

The previous prime is 331402319. The next prime is 331402349. The reversal of 331402344 is 443204133.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (331402349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87694 + ... + 91394.

It is an arithmetic number, because the mean of its divisors is an integer number (8162910).

Almost surely, 2^331402344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331402344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522426240).

331402344 is an abundant number, since it is smaller than the sum of its proper divisors (713450136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331402344 is a wasteful number, since it uses less digits than its factorization.

331402344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771 (or 3767 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 331402344 is about 18204.4594536613. The cubic root of 331402344 is about 692.0198074231.

Adding to 331402344 its reverse (443204133), we get a palindrome (774606477).

The spelling of 331402344 in words is "three hundred thirty-one million, four hundred two thousand, three hundred forty-four".